Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8f9101bb86bac9…

MALICIOUS

PDF

66.8 KB Created: 2021-09-14 08:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 515ad65078220f19e947f4d1ff2ed534 SHA-1: 6dc26d419cbc2ae37ded94a13e5312bb1c8d23ca SHA-256: cb8f9101bb86bac97409180c324342465fb6e7f6ae9c97a2a27277cd99ea06f4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9158

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://le383.com/uploads/files/nofaka.pdf In PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/18682112042.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/35786535903.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/zegewisajipekanerupu.pdfIn PDF document text
    • https://longhoang.vn/upload/files/53803840219.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/54223033450.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/13497883803.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/zagosiw.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/lemig.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/29104152272.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/bimutegedulexup.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-03/2109032045302426182rg5octex8hc.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/rapigibudubejimapoket.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/wimowiwaluduwunokaketisul.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5utmduv9do9kclatmjmkdv25n1/xuwipoga.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/71841070111.pdfIn PDF document text
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/24580953689.pdfIn PDF document text
    • http://photojet.net/userfiles/file/bojekotusilafosi.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/71197942009.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/23735276140.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/54960353260.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/60176238071.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/tumirajivodorizoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=jak+nagra%C4%87+rozmow%C4%99+telefoniczn%C4%85+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 18128 bytes
SHA-256: 8cf20b090a6b18a284da3c91caf3854707921ad0a0593a152df1a190cce65eaf

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